Stop mechahism foe



W. t. BERTRAM.

STOP MECHANISM FOR LINOTYPE MACHINES.

AFFLICAT ION FILED SEPT- 13, I912.

Patented Aug. 15, 1916.

3 SHEETSSHEE.T I

illlll|llll+ INVENTOB ZdZZZz amZwfifi/n 5 BY i ATTORNEY W. E. BERTRAM.

STOP MECHANISM FOR LINOTYPE MACHINES.

Patented Aug. .15, 1916 3 SHEETSSHEET 2- APPLICATION FILED SEPT-13,1912. v

' INVENTOR W5 ZZZ/@176 jghBe rmvz,

ATTORNEY w. E. BERT'RAM.

STOP MECHANISM FOR LINOTYPE-MACHINES.

APPLICATION FILED SEPT-13,1912.

Patented Aug. 15,1916.

3 SHEETS-SHEETS.

NTQR Z02 ZZLaInZ Be; 1 "am ATTORNEY- WILLIAM E. BEBTBAM, OE BEOOKLYN, NEW YORK, 'ASSIGNOB TO INTEETYBE CORPO- RATION. OF NEW YORK, N. ,1, A CORPORATION OF NEW YORK.

sror innonnmsm ron LmorYrn-macnmns.

Specification of Letter s latent.

racemes Aug. '15, 1916.

Application filed september 18, 1912, Serial No. 720,293.

To all whom it may concern: ,7

Be it known that I, WILLIAM E. BERTRAM,

. a citizen of the United States, residing at Brooklyn, in the countyof Kings and State of New York, have invented new and useful Improvements in Stop Mechanism for ments in linotype machines, and the pri-- mary object is to provide improved stop mechanism therefor whereby the stopping of the machine after completing each, cycle of operations is effected without rebound or jar and the driving clutch is positively locked in inoperative C 0Dd1 i310I1 with the parts of the machine occupying a predetermined relation, and the starting of the machine is efi'ected easily and by slight pressure.

In linotype machines as commonly used the movements of the machine areobtamed from a main cam shaft which carries relatively large and heavy cams, and this cam shaft usually makes one complete revolution and then stops during'each cycle ofbperations, although the cam shaft is occasionally stopped temporarily before completing a revolution. lnpractice, it has been found that considerable rebound and shock" occurs in the operation offllinotype machines ascommonly constructed due to the inertia of the relatively heavy cams on the cam shaft,

this objection being obviated by the present invention, and also the present Invention enables the cam shaft-to be stopped a'ccui will be hereinafter more fully described, the

novel features being pointed out particularly inthe claims atthe end of the speclfication. In the accompanying drawing: Figure 1 represents a side elevation, partly in section, of a portion. of a linotype machine tion, the parts being shown inlocked and unlocked condition, respectively; Fig. 5 is a detail view of the non-rebound stop showing the unlocking device; Fig. 6 is a perspective view of the non-rebound stop, the cooperative pawl on the main cam shaft, and a portion of the clutch-controlling connections. 7

Similar parts are designatedby the same reference characters in the several views.

The present invention is particularly applicable to the well known linotype ma-' chine, and although the invention is not necessarily restricted to a machine of that .specifictype, the present embodiment of the invention is shown as applied to a linotype machine. In the present instance, 1 designates the main cam shaft which carries the relatively large and heavy cams which produce the diflerent movements of the machine, this cam shaft being driven by a gear 2 which meshes with a pinion 3 on the power shaft 4, the latter being provided with a' driving wheel 5 having a clutch drum 6 with which a pair'of clutch shoes 7 00- operates, these clutch shoes in thepresent instance being operatively connected to the toggle links 8 and these toggle links being connected to a cross-head 9, the latter co- "operating withan operating rod 10. The

rod 10 is movable axially within the driving shaft 4 and is provided with a spring 11 which tends normally to spread the toggle links Sand thereby force the clutch shoes 7 into driving engagement with theclutch drum on the wheel 5. The rod 10 has a collar 12 attached thereto, this collar being slidable on the exterior of the power shaft 4 and is adapted to be engaged by an arm 13 of a bell-crank 14, the latter being pivoted I at'15 to a portion 16 of the frame of the machine, and the other arm17 ofthe bellcrank is adapted to be engaged by one end of a bar 18, the latter being guided at its opposite end by the pin Hand is operatively connected by a link 20 to a hand lever 21, this hand lever turning about the pin 19 as a center. The operation of the machine may be interrupted manually by manipulation of the hand lever 21 whereby the bar-18 is pushed against the arm 17 of the bell-crank lever and the arm 13 of the Fig. 2, thereby overcoming the action of thespring 11 and causing the toggle links 8 to latter forces. the collar 12 to the right in tation of the main cam shaft after the latter has completed each revolution is constructed .as follows:,The main cam shaft 1 carries acam 22 and this cam carries a pawl 23 which is movable laterally. in a notch 24 of the cam, the pawl cooperating, according to the present invention, with a non-rebound stop 25 which is pivoted at 26 on the vertical stationary shaft 27 so as to swing in substantially the plane of revolution of the mounted pawl23 and normally occupies a position in the path of the'pawl. An abutment 28 is rigidly secured to the vertical stationary shaft 27 and is provided with a shoulder 29 which is adapted to cooperate with the under side of the stop 25 when the lattr is swung downwardly into the position indicated in Fig. 3. -A stop lever 30 is pivoted at 31 to the shaft 27, the lower end of this stop lever being arranged to cooperate with the arm 17 of the bell-crank lever 14 and the upper end of the stop lever 30 is attached to a toggle composed of the links 32 and 33, oneof. the links, the link 32 in the present in: stance, having a projection 34 which is adapted to be engaged and depressed'by the stop. 25 whereby the toggle is moved from the unlocked position, as shown in. Fig. l, into the locked-position as shown in Fig. 3, the pivotal centers of the toggle while in the latter position being in alinement and, hence, the toggle is capable of positively locking the clutch spring 11 from operation to engage the clutch. The toggle is unlocked,

however, by a lever 35 which is pivotedat 36 to the rigid arm 28, one .end of this lever cooperating with the center pivot 37 of the toggle while theopposite end of the lever is adapted to occupy a position at one side of the pawl or dog 23. A shell 38 is rotatably on the shaft 27, the lower end of this shell being provided with an arm 39 which is arranged to be engaged by the projection 40 on the bar 18, and the upper end of the shell is provided with an arm ll which is arranged normally at oneside of the path of the pawl or dog 23, but when the bar 13 is operated by the hand lever 21 to engage the clutch, the projection 40 on the bar will operate upon the arm 39 of the shell, thereby rotating the latter and causing the arm all to move the pawl 23 laterally into itsnotch 24:, thereby disengaging the pawl from the stop 25 and at'the same time rocking the lever 35, this lever operating to unlock the to e, the toggle and stop being restored to the condition shown in Fig. l and in readiness to arrest rotation of the cam shaft upon completion of its succeeding revolution. The yielding resistance offered to the pawl by the toggle and its asso-- ciated parts operates to absorb the shock ,1 incident to the arresting of rotation of the dition, although r'e-starting of the machine can be effected easily and with relatively light pressure of the operating handle, as it is only necessary to disengage the pawl on the cam shaft laterally from the stop and to unlock the toggle, the clutch spring then acting to set the clutch in driving condition. 71th a machine equipped with stop mechanism embodying the present invention, the

operator may turn the cam shaft backward by hand after this shaft has been stopped automatically, without the necessity of manipulating the hand Starting lever as heretofore.

What is claimed is 1-- 1. In a linotype machine, the combination of a main cam shaft, a driving clutch therefor, a member carried by the cam shaft for disengaging the clutch and arresting rotation of the cam shaft, and a locking device interposed between said member and the clutch for positively locking the clutch in disengaged condition and permitting retrograde rotation of the cam shaft.

a 2. Inf a linotype machine, the combination of a main cam shaft, a driving clutch therefor, means carried by the cam shaft fordisengaging the clutch and arresting rotation of the cam shaft, and automatic means independent of the cam shaft for positively holding the clutch is disengaged condition.

3. In a linotype machine, the combination of a main cam shaft, a driving clutch therefor, means carried by the cam shaft for disengaging the clutch, and a lock operated automatically by said means to positively disengage the clutch and to hold the same in disengaged condition independently of the camshaft. i

4. Ina linotype machine, the combination of a main cam shaft, a driving clutch there for having a-spring for engaging it, means carried by the cam shaft for disengaging the clutch, and a device movable in opposition to the action of the clutch spring to yieldably arrest said means on the cam shaft and operative to disengage the clutch and lock the same in disengaged condition.

5. In a linotype machine, the combination of a main cam shaft, a driving clutch therefor, a member carried by the cam shaft to control the clutch, and a toggle movable by said member into a position to disengage the clutch and to lock the clutch indisengaged position.

6. In a linotype machine, the combination of a main'cam shaft, a driving clutch therefor, a member carried by the cam shaft" to control the clutch, a toggle actuated by said member to disengage said clutch and to lock the clutch in disengaged condition, and,

' a lever operated through said member *to control the clutch, a stopping member, and a positive stop cooperative with said stopto ping member to arrest the cam shaft at a certain point in its revolution and operative to positively lock the clutch in a disengaged condition.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. J 9

. WILLIAM E. BERTRAM. Witnesses:

T. S. HoMANs, R. W. HELLON 

